Watch The Big Bang Theory Season 5 Episode 18 online via TV Fanatic with over 8 options to watch the The Big Bang Theory S5E18 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, Xfinity, TBS, and Verizon On Demand.
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Sheldon's barber gets sick this week, while astronaut training causes Wolowitz to rethink his decision to head into space.